You will get Secure, Scalable Backend API Development and Integration for an App or SaaS
Project details
I specialize in designing, developing, and integrating RESTful APIs to connect your systems and power your applications. I focus on creating secure, scalable, and well-documented APIs. My expertise is integrating APIs into complex architectures and cloud environments, including those used in financial systems and quantitative analysis.
Perfect For: Businesses needing to build or improve their APIs, companies integrating with external services, and developers requiring robust backend solutions. My particular niche is in finance, FinTech, and quantitative analysis.
What You'll Get:
• RESTful API design and documentation (OpenAPI/Swagger)
• Secure authentication and authorization implementation (OAuth 2.0, JWT)
• Integration with third-party APIs and microservices, including financial data providers (e.g., Refinitiv, Bloomberg, Coinbase)
• API performance optimization and caching strategies for high-frequency data access
• Development of SDKs and client libraries
• Versioning and lifecycle management
• Cloud-native API development (AWS)
• Implementation of automated API testing, including security and performance testing
Perfect For: Businesses needing to build or improve their APIs, companies integrating with external services, and developers requiring robust backend solutions. My particular niche is in finance, FinTech, and quantitative analysis.
What You'll Get:
• RESTful API design and documentation (OpenAPI/Swagger)
• Secure authentication and authorization implementation (OAuth 2.0, JWT)
• Integration with third-party APIs and microservices, including financial data providers (e.g., Refinitiv, Bloomberg, Coinbase)
• API performance optimization and caching strategies for high-frequency data access
• Development of SDKs and client libraries
• Versioning and lifecycle management
• Cloud-native API development (AWS)
• Implementation of automated API testing, including security and performance testing
Programming Languages
JavaScript, Python, JavaCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$299
|
Standard
$499
|
Advanced
$799
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 1 | 2 | 2 |
Number of Pages | 3 | 8 | 21 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$100 - $300
Additional Revision
+$100Frequently asked questions
About Taras
Backend Engineer | Quantitative Distributed Systems | AWS | Blockchain
Brookfield, United States - 8:21 am local time
I architect backend systems for quantitative applications where performance, reliability, and correctness aren't negotiable. Whether you're building fintech infrastructure, blockchain protocols, gaming backends, or fitness tech platforms, I bring 8+ years of mission-critical engineering discipline.
Backend systems engineered for performance and scale:
- Quantitative analysis engines and risk calculation systems
- Blockchain protocol optimizations and smart contract infrastructure
- Cloud-native architectures (AWS serverless, containerized deployments)
- High-performance APIs and data processing pipelines
How I Work:
I deliver enterprise-grade practices for production reliability:
- Test-driven development with comprehensive test coverage
- Performance benchmarking and optimization (recent work: 50% performance improvements to Hedera's protocol)
- CI/CD pipelines with GitHub Actions
- AWS infrastructure as code (CloudFormation)
My Background:
I worked for 9 years optimizing mission-critical systems serving electrical utilities and regulated industries, where downtime isn't an option. I built the automated test system for our team which handled failover of highly available systems and the breadth of C/C++, Java, C# and Python stacks.
Recent work includes contributing protocol buffer optimizations to Hedera, building quantitative risk calculators for crypto portfolios, and architecting scalable AWS infrastructure for data-intensive applications.
My Preferred Tech stack:
- Java and Python (8+ years experience), Go, TypeScript, Solidity, and C++
- Cloud: AWS Solutions Architect certified (Lambda, ECS/EKS, DynamoDB, CloudFormation)
- Practices: TDD, CI/CD, performance optimization, distributed systems
- Protocol Buffers, gRPC, PostgreSQL, Docker, Jenkins
- Quantitative: Math/CS + Finance/Accounting degrees, statistical modeling
Best Fit For: Fintech platforms, blockchain protocols, gaming backends, fitness tech, financial institutions modernizing infrastructure, or any quantitative system where reliability and performance matter.
Not a Fit For: Frontend development, mobile apps, or WordPress sites.
Portfolio: github.com/kaldun-tech
Steps for completing your project
After purchasing the project, send requirements so Taras can start the project.
Delivery time starts when Taras receives requirements from you.
Taras works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery call: Understand your needs
30-60 minute call
Design document